Magnesium Sulfate, USP Grade

Also Known as Magnesium Sulfate Heptahydrate and Epsom Salt


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Why Buy Magnesium Sulfate, USP Grade from Lab Alley

  • Price. Don’t worry! We do our homework. This product is offered at the industry’s lowest possible price.
  • Availability. In-Stock. This product is in stock and ready to ship. Orders are usually shipped in 24-48 hours.
  • Deliverability. Fast Shipping! This product is packaged with care from high quality, food grade packaging materials.
  • Quality. Our curated products bottled in America match or exceed strict specifications.

About Magnesium Sulfate, USP Grade

Magnesium Sulfate, also known as Magnesium Sulfate Heptahydrate, Magnesium Sulfate Heptahydrate, and Epsom Salt, is often available as heptahydrate of Magnesium(2+) Sulfate having the chemical formula H14MgO11S or MgSO4-7H2O. It appears as white, odorless hygroscopic crystals or powder and is soluble in Water, Alcohol at ambient conditions. A USPGrade chemical is the one that conforms to the criteria of the United States Pharmacopeia (USP). A substance that has received the USP Grade certification can be used in food, drug, or medical applications. Due to its high purity, Lab Alley’s Magnesium Chloride Powder, USP Grade is a USP Grade chemical. In the United States of America (USA), Lab Alley is selling its high-quality Magnesium Oxide Light, USP Grade online at

Common Uses and Applications

  • Personal Care
  • Households
  • Food processing


Chemistry Table


Magnesium Sulfate, USP Grade Specifications

Assay (MgSO4; Anhydrous basis) 99.0-100.5%
pH of a 5% Solution at 25°C 5.0-9.2
Loss on Ignition 48.0-52.0%
Chloride 0.014%
Iron (Fe) 20 μg/g
Heavy Metals 0.001%
Organic Volatile Impurities To Pass Test
Alkalinity or Acidity To Pass Test
Arsenic 2 ppm
Manganese To Pass Test

Safety and Shipping Information

Please contact us to request a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for Magnesium Sulfate, USP Grade.

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